/**
  * Display a listing of the resource.
  *
  * @param Request $request
  * @param int     $cardNumber
  *
  * @return Response
  */
 public function index(Request $request, $cardNumber)
 {
     $fromDate = $request->input('from_date', 10);
     $card = Card::with(['balances' => function ($query) use($fromDate) {
         $query->where('created_at', '>=', Carbon::now()->subDays($fromDate));
     }])->where('number', $cardNumber)->first();
     if (!$card) {
         return $this->respondNotFound();
     }
     return $this->respond(fractal()->collection($card->balances, new BalanceTransformer())->toArray());
 }